Calibration
Calibration with Standard Weights
VT300 Technical Manual, Rev. A4
33
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TM-VT300-EN
4.2 Calibration with Standard Weights
To perform calibration with standard weights, you must set the
CAL MODE
scale
parameter to
WEIGHT
(see section
4.1).
Calibration with standard weights is done in two stages:
Zero calibration, in which you take a weight measurement when there is nothing
on the scale (see section
4.2.1). This is also called dead-load adjustment.
Span calibration, in which you place a known weight on the scale, and manually
enter its correct weight (see section
4.2.2).
You must perform both of the above for the scale to be calibrated properly.
After calibrating the scale, you must save the values in permanent memories by
entering the setup menus and selecting the
WRITE
option (see section
4.4). It
is also advised to lock calibration (see section
4.5).
4.2.1
Zero (Dead-Load) Calibration
To perform zero calibration:
1. Press
MENU
and navigate to
SYSTEM
>
1CAL
>
ZERO
. Or, if you wish to calibrate
scale 2, navigate to
SYSTEM
>
2CAL
>
ZERO
.
2. Press
ENTER
. The display shows
EMPTY SCALE
. Clear the scale, and wait about 10
seconds.
3. Press
ENTER
to record the zero position. The display shows
WAIT…
as 64
measurements are taken and an average calculated. This should take about 10
seconds.
4. The display should now show
0
. If the zero point is not accurate, press
ESC
and go
back to step 1.
4.2.2
Span Calibration
To perform span calibration:
1. Press
MENU
and navigate to
SYSTEM
>
1CAL
>
SPAN
. Or, if you wish to calibrate
scale 2, navigate to
SYSTEM
>
2CAL
>
SPAN
.
2. Press
ENTER
. The display shows
WEIGHT
, followed by the maximum capacity of the
scale. Enter the correct calibration weight using the numeric keypad.
3. Press
ENTER
to confirm the calibration weight. The display shows
LOAD SCALE
.
4. Place the calibration weight on the scale, and wait about 10 seconds.
5.
Press
ENTER
. The display shows
WAIT…
as 64 measurements are taken and the
span coefficient calculated. This should take about 10 seconds.
6. Span calibration is now complete. If the weight shown is not accurate, press
ESC
and go back to step 1.
